Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of WEDNESDAY: DECEMBER 31 , 2008
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 6.1 8.1 75 8.8 10.3 85
COTTONWOOD CREEK 7670 10.6 9.5 112 13.8 13.3 104
GRAND TARGHEE 9260 17.8 -M * 16.6 -M *
GRANITE CREEK 6770 -M 7.5 * -M 9.4 *
GRASSY LAKE 7265 12.7 14.5 88 16.4 17.1 96
GROS VENTRE SUMMIT 8750 6.9 6.8 101 7.8 6.3 124
GUNSIGHT PASS 9820 6.2 -M * 7.4 -M *
LEWIS LAKE DIVIDE 7850 11.7 14.5 81 15.6 17.3 90
PHILLIPS BENCH 8200 11.9 12.4 96 14.4 13.3 108
SALT RIVER SUMMIT 7760 4.9 5.3 92 6.7 8.8 76
SNAKE RIVER STATION 6920 5.8 7.7 75 9.8 10.9 90
SPRING CREEK DIVIDE 9000 9.8 12.3 80 11.2 12.8 87
THUMB DIVIDE 7980 7.5 7.5 100 9.7 9.0 108
TOGWOTEE PASS 9580 12.4 11.5 108 13.8 11.9 116
TWO OCEAN PLATEAU 9240 14.7 13.3 111 11.7 13.3 88
WILLOW CREEK 8380 12.7 14.1 90 17.3 15.3 113
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Basin wide percent of average 93 98
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 9.0 11.3 80 8.2 9.9 83
BLACK BEAR 8170 15.4 17.0 91 17.5 17.4 101
CANYON 7870 5.4 6.0 90 6.2 7.7 81
FISHER CREEK 9100 15.2 16.0 95 14.7 16.9 87
MADISON PLATEAU 7750 9.3 11.0 85 11.3 12.2 93
NORTHEAST ENTRANCE 7350 3.3 4.9 67 6.2 6.3 98
PARKER PEAK 9400 11.0 10.4 106 8.0 8.1 99
SYLVAN LAKE 8420 7.8 10.3 76 10.1 10.9 93
THUMB DIVIDE 7980 7.5 7.5 100 9.7 9.0 108
TWO OCEAN PLATEAU 9240 14.7 13.3 111 11.7 13.3 88
WHISKEY CREEK 6800 6.5 7.4 88 9.5 9.8 97
WHITE MILL 8700 9.6 11.0 87 10.0 12.6 79
WOLVERINE 7650 4.2 5.7 74 5.3 6.9 77
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Basin wide percent of average 90 91
WIND RIVER
BURROUGHS CREEK 8750 7.2 6.7 107 7.9 7.9 100
COLD SPRINGS 9630 3.7 4.6 80 5.4 5.7 95
DEER PARK 9700 6.5 6.7 97 8.9 10.8 82
HOBBS PARK 10100 6.1 7.6 80 6.2 6.3 98
LITTLE WARM 9370 5.0 5.3 94 6.7 6.6 102
SOUTH PASS 9040 6.2 8.1 77 8.2 9.1 90
ST. LAWRENCE ALT 8620 1.7 3.7 46 4.3 4.6 93
TOGWOTEE PASS 9580 12.4 11.5 108 13.8 11.9 116
TOWNSEND CREEK 8700 3.6 4.4 82 5.7 6.0 95
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Basin wide percent of average 89 97
BIGHORN BASIN
BALD MTN. 9380 10.2 9.6 106 9.1 8.4 108
BEAR TRAP MEADOW 8200 3.7 2.6 142 5.0 4.5 111
BLACKWATER 9780 10.2 11.9 86 9.5 10.7 89
BONE SPRINGS DIV 9350 9.6 7.7 125 8.0 7.2 111
EVENING STAR 9200 11.3 13.5 84 12.6 12.8 98
GRAVE SPRINGS 8550 2.9 4.0 72 4.7 4.8 98
KIRWIN 9550 6.1 5.9 103 6.6 5.8 114
MARQUETTE 8760 2.1 4.9 43 4.8 5.3 91
MIDDLE POWDER 7760 4.0 5.5 73 5.0 6.8 74
OWL CREEK 8975 3.1 2.7 115 3.1 2.9 107
POWDER RIVER PASS 9480 6.2 5.2 119 7.1 5.9 120
SHELL CREEK 9580 8.6 7.3 118 8.6 6.6 130
SYLVAN LAKE 8420 7.8 10.3 76 10.1 10.9 93
SYLVAN ROAD 7120 5.1 6.1 84 7.7 10.0 77
TIMBER CREEK 7950 2.2 3.0 73 4.9 3.7 132
YOUNTS PEAK 8350 8.3 7.8 106 7.9 8.1 98
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Basin wide percent of average 94 100
SHOSHONE RIVER
BLACKWATER 9780 10.2 11.9 86 9.5 10.7 89
EVENING STAR 9200 11.3 13.5 84 12.6 12.8 98
KIRWIN 9550 6.1 5.9 103 6.6 5.8 114
MARQUETTE 8760 2.1 4.9 43 4.8 5.3 91
SYLVAN LAKE 8420 7.8 10.3 76 10.1 10.9 93
SYLVAN ROAD 7120 5.1 6.1 84 7.7 10.0 77
YOUNTS PEAK 8350 8.3 7.8 106 7.9 8.1 98
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Basin wide percent of average 84 93
POWDER-TONGUE
BEAR TRAP MEADOW 8200 3.7 2.6 142 5.0 4.5 111
BIG GOOSE 7990 3.9 4.3 91 6.1 4.5 136
BONE SPRINGS DIV 9350 9.6 7.7 125 8.0 7.2 111
BURGESS JUNCTION 7880 5.8 5.4 107 6.8 6.0 113
CLOUD PEAK RESERVOIR 9860 7.7 5.7 135 8.3 6.3 132
DOME LAKE 8880 6.1 6.0 102 7.8 6.8 115
GRAVE SPRINGS 8550 2.9 4.0 72 4.7 4.8 98
HANSEN SAWMILL 8360 2.7 3.2 84 5.3 4.3 123
MIDDLE POWDER 7760 4.0 5.5 73 5.0 6.8 74
POWDER RIVER PASS 9480 6.2 5.2 119 7.1 5.9 120
SUCKER CREEK 8880 7.3 5.2 140 8.9 6.6 135
TIE CREEK 6870 1.6 2.5 64 7.6 5.1 149
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Basin wide percent of average 107 117
BELLE FOURCHE
BLIND PARK 6890 4.5 3.5 129 8.5 6.1 139
COLE CANYON 5910 3.2 3.2 100 7.2 3.9 185
NORTH RAPID CREEK 6130 4.8 3.2 150 7.9 5.3 149
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Basin wide percent of average 126 154
UPPER N. PLATTE RIVER
COLUMBINE 9160 8.4 9.8 86 8.8 11.3 78
DIVIDE PEAK 8880 7.9 9.1 87 10.1 9.9 102
ELK RIVER 8700 8.4 7.1 118 9.4 8.8 107
JOE WRIGHT 10120 10.9 9.6 114 13.4 11.8 114
NORTH FRENCH CREEK 10130 12.3 13.2 93 12.2 11.9 103
OLD BATTLE 10000 12.7 14.5 88 16.0 15.8 101
SAGE CREEK BASIN 7850 4.0 5.3 75 5.9 5.8 102
SOUTH BRUSH CREEK 8440 6.0 5.1 118 7.7 7.7 100
TOWER 10500 13.6 20.4 67 16.4 17.7 93
WEBBER SPRINGS 9250 9.9 11.3 88 12.5 12.9 97
WILLOW CREEK PASS 9540 5.9 5.5 107 6.6 6.4 103
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Basin wide percent of average 90 99
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 8.1 10.6 76 8.2 10.0 82
CASPER MTN. 7900 3.3 6.9 48 6.1 7.2 85
DEADMAN HILL 10220 6.8 7.5 91 7.3 7.8 94
DEER PARK 9700 6.5 6.7 97 8.9 10.8 82
LAPRELE CREEK 8375 -M 5.3 * -M 6.1 *
RENO HILL 8400 4.0 6.5 62 5.3 7.1 75
ROACH 9700 6.9 7.2 96 8.2 8.4 98
SAND LAKE 10050 11.1 14.7 76 10.2 11.4 89
SOUTH PASS 9040 6.2 8.1 77 8.2 9.1 90
WINDY PEAK 7900 2.3 3.5 66 3.1 5.5 56
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Basin wide percent of average 77 85
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 4.3 4.0 108 7.1 7.0 101
DIVIDE PEAK 8880 7.9 9.1 87 10.1 9.9 102
OLD BATTLE 10000 12.7 14.5 88 16.0 15.8 101
SANDSTONE RS 8150 5.8 5.1 114 8.2 8.8 93
WHISKEY PARK 8950 10.3 10.9 94 12.7 13.0 98
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Basin wide percent of average 94 99
UPPER GREEN RIVER
BIG SANDY OPENING 9080 5.5 6.8 81 5.9 6.5 91
BLIND BULL SUM 8650 9.7 13.0 75 9.5 10.9 87
EAST RIM DIVIDE 7930 3.5 5.8 60 6.5 5.7 114
ELKHART PARK G.S. 9400 6.3 6.2 102 7.8 6.6 118
GROS VENTRE SUMMIT 8750 6.9 6.8 101 7.8 6.3 124
GUNSIGHT PASS 9820 6.2 -M * 7.4 -M *
KENDALL R.S. 7740 4.7 6.6 71 7.1 6.8 104
LOOMIS PARK 8240 7.0 7.9 89 9.3 8.2 113
NEW FORK LAKE 8340 5.8 5.3 109 5.7 5.8 98
SNIDER BASIN 8060 5.3 6.8 78 6.5 7.8 83
SPRING CREEK DIVIDE 9000 9.8 12.3 80 11.2 12.8 87
TRIPLE PEAK 8500 10.1 11.7 86 11.6 11.0 105
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Basin wide percent of average 84 101
LOWER GREEN RIVER
HAMS FORK 7840 3.1 5.4 57 5.0 5.7 88
HEWINTA 9519 2.3 4.0 57 5.3 6.9 77
HICKERSON PARK 9145 .8 2.8 29 3.4 4.2 81
HOLE-IN-ROCK 9150 1.5 2.6 58 3.7 3.8 97
INDIAN CREEK 9425 9.2 12.3 75 9.6 12.0 80
KELLEY R.S. 8180 6.0 7.5 80 7.6 9.9 77
STEEL CREEK PARK 10200 3.8 6.6 58 6.9 7.5 92
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Basin wide percent of average 65 83
UPPER BEAR RIVER
BUG LAKE 7950 4.2 8.1 52 7.1 9.1 78
HAYDEN FORK 9212 6.7 6.2 108 9.2 9.9 93
KELLEY R.S. 8180 6.0 7.5 80 7.6 9.9 77
LILY LAKE 9156 5.3 5.4 98 7.1 8.6 83
MONTE CRISTO 8960 9.9 10.8 92 11.1 11.9 93
SALT RIVER SUMMIT 7760 4.9 5.3 92 6.7 8.8 76
TRIAL LAKE 9992 9.3 10.3 90 9.7 11.1 87
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Basin wide percent of average 86 84
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
If the Basin wide percent of average value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Average represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the average value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the average value for those sites on this day.
Contact your state water supply staff for assistance.
Reference period for average conditions is 1961-90.
Provisional data, subject to revision.
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.